System for weather-stripping sliding sash windows



Jan. 16, 1945. p, RQBERTSON 2,367,616

SYSTEM FOR WEATHER STRIPPING SLIDING SASH WINDOWS Filed Jan. 4. 1943 .U f, Eaberism Patented Jan. 16, 1945 SYSTEM FOR WEATHER-STRIPPIN G SLIDING SASH WINDOWS Daniel Pettigrew Robertson, Arlington, Va.'

Application January 4, 1943, Serial No. 471,287

' 3 Claims.

This invention relates to a system for weather stripping a sliding sash window.

One of the objects of the invention is to provide a transverse weather stripping at the top and bottom of the window, carried respectively by the bottom rail of the lower sash flush with the inner surface thereof and by the top rail of the upper sash flush with the outer surface thereof, contacting respectively the horizontal surfaces of the bottom and top window frame members.

Another object of the invention isthe provision of lateral weather stripping secured. to the nose of the parting bead throughout its length, having a linear yielding packing element projecting oppositely from its respective lower and upper portions, contacting respectively the adjacent outer face of the side rail of the lower sash and the adjacent inner face of the side rail of the uppersash.

A further object of the invention is to provide the lateral weather stripping with a resilient stop at the height of the meeting rails constituting a transverse continuation of the longitudinal weather strips between the sides of the lower and upper sashes and the window frame, and also functioning as a localized guiding means for the lower sash.

Still another object of the invention is the provision of a weather strip on the under side of the meeting rail of the upper sash projecting across the joint between the meeting rails of both sashes.

Another object of the invention is the correlation of the structures referred to in the above objects, providing a complete weather seal for a window of the type described.

Other objects of the invention will appear as the following description of a. preferred and practical embodiment thereof proceeds.

In the drawing which accompanies and forms a part of the following specification and throughout the several figures of which the same characters of reference have been employed to denote identical parts:

Figure 1 is a front view in elevation of a. window, weather stripped in accordance with the principles of the invention;

Figure 2 is a cross-section, part being broken away, taken along the line 22 of Figure 1;

Figure 3 is a cross-section, part being broken away, taken along the line 3-3 of Figure 1;

Figure 4 is a cross-section, part being broken away, taken along the line 4--4 of Figure 1;

Figure 5 is a perspective view illustrating in particular the transverse stop at the ends of the,

meeting rails;

Figure 6 is a perspective view in detail showing the transverse stop in operative relation to the meeting rails;

Figure '7 is a perspective View of a detail of construction illustrating the construction and arrangement of the weather strip at the bottom of the lower sash.

Referring now in detail to the several figures, the weather strip preferably employed in carrying out the subject invention is ofthe type perhaps best shown in Figure 5, consisting of a wooden batten I having a rabbet 2 on its under side and a length of flexible wicking 3 seated in the rabbet and secured thereto as by stapling, the wick being flush with the under side of the batten l and having a margin 4 projecting beyond one longitudinal edge of the batten.

The invention contemplates the application of this type of weather strip to completely seal the air leakage path between the two sliding surfaces 5 and 6 and the window frame 1, and between the meeting rails 8 and 9 of said sashes, with the additional intercalation of the stop I 0 across the gap at the ends of the meeting rails 8 and 9 of the sashes.

In applying the weather strip to the bottom and top rails II and I 2 of the respective lower I and upper sashes, the lower inner edge of the rail I l and the upper outer edge of the rail l2 are rabbeted and lengths of weather strip l5 and I6 are set into the respective rabbets for the full length thereof and nailed in place, the wick margin 4 projecting downwardly below the rail II and upwardly above the rail l2, the wick being trained so that its side makes contact with the sill [3 of the window frame, in the case of the lower sash rail II, and its side makes contact with the top frame member I4 in the case of the upper sash rail l2. As the wick, thus trained, is resilient, it engages the window frame with yielding pressure, thus forming an effective seal.

Particularly with respect to the lower sash, the interposition of the wick margin between the rail II and sills I 3 spaces these parts a slight distance apart, preventing the retention of moisture which would tend to rot said parts, and in the case of freezing, would cause the lower sash to become stuck in closed position.

In sealing the crack between the meeting rails 8 and 9, a length of weather strip I2" is nailed to the under side of the meeting rail 9 of the upper sash toward the inner side thereof with the wicking adjacent the rail, having its projecting marginal portion extending beneath the joint between the meeting rails. Said projecting portion presses yieldingly against the under side of the meeting rail 8, making an effective seal.

The leakage path between the sides of the sashes and the window frame is sealed on each side by nailing the weather strip to the nose of the parting bead I1 between the sashes for the full length of said parting bead The weather strip is divided into two sections I8and'I9, the line of division being intermediate the planes of the top and bottom faces of the meeting rails when the sashes are closed. The wicksare in.

reversed relation, the projecting wicking of the' lower section being in the path of the lower sash, while the projecting wicking of theupper section is in the path of movement of the upper sash. The wicking is trained to lie fiatwise against the edge so that it presses resiliently thereagainst.

If the partition bead is bull-nosed, it may be removed and planed fiat preparatory-to the' installation of the weather strip, but it is preferably substituted by a flat-nosed'parting bead.

It still remains to seal the leakage path upward past the ends of the meeting rails-8' and" 9. This is accomplished by means of the stop I0, which is mounted on the weather stripping carried bythe parting bead, overlying the junction between the wicks and located, when the sashes are closed, back of theends ofthe meeting rail B'of the lower sash andback of so-much of the meeting rail 9 of the upper sash as extends forwardly of the plane of the-inner faces of: the sidemembers of the upper sash.

The stop lll is a resilient metal clip 2| having asecuringlug 20 adapted to be nailed to the weather strip on the parting bead,-,and-offset with respect tosaid lug to form a-face 20- biased toward the sash, and engageablewith the'end of the meeting rail 8 with resilient pressure.

The upper end of the metal clip: is overturned toward the parting: bead, defining an enclosure which houses a short pieceofiiveathenstrip-M;

both the wood and'wick' element with-the wick element 23 projecting outwardly-towardthe upper sash In order to make room for thestop ID, the end-of the meetingirail 8:0? the'lower sash is cut sufficiently shorter in.avertical planeparallel to the end of said meeting. IEtll', and: the portion of the meeting rail 9 whichprojjects inwardly beyond the-plane of theinner. faces of-thesides" of the upper sash is likewise cut away. to makeroom for the projecting wick portion 23 of the weather strip;22.' The-metal clip-2l extends just to the upper outer edge at the meeting rail S and the projecting wick portion 23- contacting: .the back of the rabbet formed by cutting-off. the-in wardly projecting, portion of the end'ofthemeeting rail 9.

The lower sash'5 makes the usual?- free fit with" the sides of the window while= beingiraised-or lowered, until it is lowered to the point at which the meeting rail 8 encounters the=stops When thisposition has been reached,'the-stops- Wexercise a localized friction against the ends of the meeting rail 8, due to the outward pressure of the metal clip 21 which also hold the sash against rattling when the sash is closed.

It will be understood to those skilled in the art that by the construction and installation of the weather stripping as above described, a complete barrier has been interposed to weather leakage from the outside to the inside about and between the sashes, and while I have specified certain preferred materials in the construction of the weather strip, these may be substituted by materials having an equivalent function without transcending the scope of the invention.

What I claim as my invention is:

1. System of weather stripping a sliding sash window of "the conventional type having a frame, upper and lower sashes with meeting rails, and parting beads between the sashes, said system employing linear Weatherstrip in the form of a rabbeted batten having a flexible element secured in the rabbet flush with a side of the batten and having a marginal portion projecting along a longitudinal edge of said batten, said system comprising a weather strip secured to a nose of the against the meetingsash rails when thesash are closed.

2; System of weather stripping as claimed in claim 1, the flexible margins being trained to press sidewise against the respective sashes.

3. System of weather stripping a sliding sash window of the conventional type having a frame, upper and lower sashes with meeting rails, and parting beads DBtWGEIIthB sashes, said system employing linear Weatherstrip in the form of a rabbeted batten having a; flexible element secured in therabbet flush with a side of the batten.- andhaving a ma-rginal portion projecting along" a: longitudinal edge of said batten, said system comprising a weather strip secured toa nose of the parting bead on each sideof the window" forthelength of said parting bead, di-

vided' into two-sections abutting at the level of the a meeting rails,.the-uppersection having the flexible margin pressing the inner side of the upper sash-- and the-lower section having the flexible the joint between said: sections, comprising a re"- silient clip biasedtoward the end of the' meeting 7 margin pre'ssingth'eouter side of the lower sash, and a. stop secured to' said'weather strip overlying rail. of thelower'sash' and engaging said meeting rail when the-lower sash is closed, saidstop extending the width-of theparting bead-and-having a flexible element projectingfrom one side ofsaidclip toward the upper sash, engaging thelatter in-the plane of the'inner face of the side margins of said sash.

DANIEh PETTIGREW' ROBERTSON.- 

